EP2327176A1 - End-to-end qos and flow control for adaptive channels - Google Patents
End-to-end qos and flow control for adaptive channelsInfo
- Publication number
- EP2327176A1 EP2327176A1 EP09814151A EP09814151A EP2327176A1 EP 2327176 A1 EP2327176 A1 EP 2327176A1 EP 09814151 A EP09814151 A EP 09814151A EP 09814151 A EP09814151 A EP 09814151A EP 2327176 A1 EP2327176 A1 EP 2327176A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bit rate
- encapsulation device
- user data
- enforcer
- modulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 15
- 238000005538 encapsulation Methods 0.000 claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 230000001276 controlling effect Effects 0.000 claims abstract 2
- 238000004891 communication Methods 0.000 claims description 18
- 230000003595 spectral effect Effects 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 240000004752 Laburnum anagyroides Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008713 feedback mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/18—End to end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/20—Traffic policing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
Definitions
- This invention relates to the field of communication networks in general and more specifically to the fields of traffic engineering and quality-of-service providing and monitoring.
- High speed data networks may be configured to support quality-of-service sensitive applications and/or to enforce service level agreements (SLA). These requirements may be satisfied through use of tight quality of service (QoS) monitoring and traffic engineering mechanisms. Therefore such networks may often be configured to use schedulers and other methods for distributing available bandwidth and/or capacity between users and applications according to priorities, weights, SLA, etc.
- SLA service level agreements
- one characteristic of adaptive channels is dynamic user data throughput. While a channel's rate (i.e. the number of transmitted symbols per second) remains constant, user data throughput constantly changes according to the modulation and coding (MODCOD) combinations being used for modulating the transmission carrier signal. User data throughput may change very rapidly in response to a sudden degradation in link conditions (e.g. rain fades over satellite links).
- MODCOD modulation and coding
- a feedback mechanism may be used for at least the purpose of informing one or more QoS enforcers regarding the amount of available bandwidth and/or capacity over a transmission link or a channel, regardless of the current amount of user data being transmitted over that link (e.g. a link utilization ratio).
- the available bandwidth and/or capacity may be calculated at any given time while user data may be transmitted over the transmission link or channel. Such calculation may be performed according to the average spectral efficiency by which data is transmitted over a transmission link or a channel at the time of calculation.
- a QoS mechanism may be configured to forward traffic according to the available bandwidth and/or capacity it can actually send to the network.
- Fig 1 shows a block diagram of a communication network in accordance with the aspects of this invention.
- Fig 1 shows a block diagram of a communication network, which includes a transmission chain 100.
- Transmission chain 100 may be comprised of a boarder router 110, a QoS enforcer 120, one or more data processors 130a to 13On, an encapsulation function or an encapsulation device 140, and a modulator 150.
- Fig 1 also shows a network controller 160 and a front end unit 190.
- Boarder router 110 may be configured to allow only selected traffic to enter the transmission chain, such as traffic destined to one or more receiving parties at the other end of the transmission channel.
- QoS enforcer 120 may be configured to at least provide flow control functionality by limiting the total data rate sent towards data processors 130a to 13On and thereafter towards encapsulation function 140.
- QoS enforcer 120 may be replaced by a traffic engineering device or a traffic shaping device, which perform similar flow control functions.
- One or more data processors 130a to 130n may be configured to receive user data and process it using one or more methods and/or algorithms, including but not limited to encryption algorithms, compression algorithms, acceleration methods and any other method which may be applicable for optimizing user traffic over the transmission link. Furthermore, data processors 130a to 130n may be configured to send the processed data towards encapsulating device 140, e.g. over an IP protocol. In some embodiments, one or more TCP and/or UDP tunnels may be used by each data processor in order to transfer different types of data (e.g. real-time information, multicast streams, non-real-time data, etc).
- TCP and/or UDP tunnels may be used by each data processor in order to transfer different types of data (e.g. real-time information, multicast streams, non-real-time data, etc).
- Encapsulation device 140 may be configured to at least receive user data information (e.g. over an IP protocol using one or more TCP and/or UDP tunnels), encapsulate it over an applicable transport stream (e.g. Baseband Frames for a DVB-S2 carrier in a satellite communication system) and provide the transport stream to modulator 150.
- Modulator 150 may be configured to at least modulate the transport stream using the applicable modulation technique and to output a modulated signal.
- Fig 1 shows encapsulation device 140 and modulator 150 as two different entities or devices, in some embodiments the encapsulation function may be integrated with the modulator in a single device. Both types of embodiments are consistent with the aspects of this invention.
- data processors 130a to 130n may be either bypassed or absent from the transmission chain.
- user data may be sent from QoS enforcer 120 directly to encapsulation device 140.
- the output of modulator 150 may be fed into a front-end 190, which may be configured to do any one or more of amplifying the modulated signal, changing the signal's carrier frequency, converting the signal to a different form (e.g. form electric form to electro-magnetic form or to optic form) and any other function which may be required in order to actually have the signal transmitted over the designated media.
- modulator 150 and encapsulation device 140 may be configured to use one or more adaptive transmission techniques (e.g. DVB-S2 in satellite communication systems), whereby the spectral efficiency of the modulated signal may be modified on a frame-by-frame basis. If a receiving station has good reception conditions (i.e. the transmitted signal is received at high C/N ratio), modulator 150 may be indicated to modulate the data destined to that station using a modulation technique, which maps more bits into each transmitted symbol. Furthermore, encapsulation device 140 may be indicated in such a case to encode said data using weaker forward error correction (FEC) codes for at least the purpose of decreasing the number of transmitted bits used for FEC.
- FEC weaker forward error correction
- modulator 150 may be indicated to modulate the data destined to that station using a modulation technique, which maps less bits into each transmitted symbol.
- encapsulation device 140 may be indicated in such a case to use stronger FEC codes, which may impose higher overhead but also increase the probability of recovering the transmitted data at the receiving side.
- a network controller (e.g. network controller 160) may be configured to send and data processors 130a to 130n may be configured to receive information regarding a most efficient MODCOD combination that may be supported by a receiving party.
- Data processors 130a to 130n may be further configured to attach MODCOD information received from the network controller to every data packet sent towards encapsulation device 140, wherein said MODCOD information relates to the receiving party which the data included in the transmitted packet is destined for.
- MODCOD information may be sent from the network controller to encapsulation device 140, which may be further configured to use the appropriate MODCOD information based on destination analysis.
- Each MODCOD combination may be characterized by a different spectral efficiency figure, i.e. different number of user bits per transmitted symbol. Since MODCOD adaptability may be implemented on a frame-by-frame basis and since modulator 150, in most cases, may be configured to transmit at a constant preconfigured symbol rate, the channel's throughput depends on the number of frames transmitted using each MODCOD combination. Throughput may be higher as more frames are transmitted using more efficient MODCOD combinations, or lower as more frames are transmitted using more robust and less efficient MODCOD combinations.
- encapsulation device 140 may be configured to calculate an average spectral efficiency figure for the transmission channel and thereafter use this average spectral efficiency figure for calculating the available user data throughput or bit rate.
- Encapsulation device 140 may be configured to measure the actual user data throughput, e.g. by counting and/or calculating the number of user traffic bits or bytes being transmitted over a period of time. Encapsulation device 140 may be further configured to gather information on the current blend of MODCOD combinations, which may be used for transmitting the same user data traffic over the same period of time. As previously described, MODCOD information may be attached to each data packet arriving from the data processors or internally generated by encapsulation device 140 based on information received from a network controller. Using this MODCOD information, encapsulation device 140 may calculate the number of user traffic bits or bytes that were transmitted using each MODCOD combination. Having measured the actual user throughput and determining how many user traffic bits or bytes have been transmitted using each MODCOD combination, encapsulation device 140 may calculate the average spectral efficiency for the transmitted data.
- encapsulation device 140 may be configured to calculate the number of unused symbols (which may be filled either by modulator 150 with dummy frames or by encapsulation device 140 with null packets). Knowing the number of unused symbols per the measurement interval, encapsulation device 140 may further be configured to calculate the user traffic bit rate or throughput that may be accommodated by these unused symbols assuming the average spectral efficiency previously calculated is applicable to these symbols as well.
- Port #1 of encapsulation device 140 may receive user traffic at a rate of 250Kbytes per second (2Mbps), out of which lOOKbytes per second are transmitted using a QPSK 5/6 MODCOD combination and the remaining 150Kbytes per second are transmitted using an 8PSK 2/3 MODCOD option.
- Port #2 of encapsulation device 140 may receive user traffic at a rate of 250Kbytes per second (2Mbps), all of which is transmitted using an 8PSK 2/3 MODCOD option.
- Encapsulation device 140 generates lMbps worth of null packets, which are transmitted using a QPSK 1/4 MODCOD combination.
- the average spectral efficiency may be calculated as follows:
- a feedback path may exist between encapsulation device 140 and QoS enforcer 120.
- Encapsulation device 140 may be configured to use this feedback path for at least the purpose of sending the calculated available bit rate to QoS enforcer 120.
- this information may be encapsulated into an SNMP trap packet, which may be transmitted over a local LAN to which both devices may be connected.
- QoS enforcer 120 may be configured to receive available bit rate information over a feedback channel and to reconfigure any of its internal software and/or hardware modules for at least the purpose of regulating its output bit rate according to the received available bit rate information.
- QoS enforcer 120 may first serve preconfigured service level agreements (SLA) and high priority applications and only then allocate the remaining throughput to other applications, streams and/or traffic types.
- SLA service level agreements
- changes in the transmission channel's throughput may affect low priority traffic while SLA and high priority applications may continue to receive high quality of service (i.e. their required throughput).
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9736008P | 2008-09-16 | 2008-09-16 | |
PCT/IB2009/006834 WO2010032106A1 (en) | 2008-09-16 | 2009-09-14 | End-to-end qos and flow control for adaptive channels |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2327176A1 true EP2327176A1 (en) | 2011-06-01 |
EP2327176A4 EP2327176A4 (en) | 2011-11-09 |
EP2327176B1 EP2327176B1 (en) | 2013-08-14 |
Family
ID=42039113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09814151.8A Active EP2327176B1 (en) | 2008-09-16 | 2009-09-14 | End-to-end qos and flow control for adaptive channels |
Country Status (3)
Country | Link |
---|---|
US (2) | US9923820B2 (en) |
EP (1) | EP2327176B1 (en) |
WO (1) | WO2010032106A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8311013B2 (en) * | 2009-10-28 | 2012-11-13 | Motorola Mobility Llc | Method for efficiently increasing hand-off and access reliability |
US8433783B2 (en) * | 2010-09-29 | 2013-04-30 | Citrix Systems, Inc. | Systems and methods for providing quality of service via a flow controlled tunnel |
FR2984641B1 (en) * | 2011-12-15 | 2014-06-13 | Eutelsat Sa | TRANSMITTING / RECEIVING RADIO SIGNAL INSTALLATION |
EP3298823B1 (en) * | 2015-05-22 | 2020-12-23 | Nokia Technologies Oy | Averaged end-user throughput evaluation |
US10511650B2 (en) | 2015-10-01 | 2019-12-17 | At&T Intellectual Property I, L.P. | Quality of service system for a service provider that provides media content via a satellite media distribution system and a terrestrial media distribution system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US6163766A (en) * | 1998-08-14 | 2000-12-19 | Motorola, Inc. | Adaptive rate system and method for wireless communications |
US20020054578A1 (en) * | 2000-07-13 | 2002-05-09 | Qian Zhang | Channel and quality of service adaptation for multimedia over wireless networks |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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US6091777A (en) * | 1997-09-18 | 2000-07-18 | Cubic Video Technologies, Inc. | Continuously adaptive digital video compression system and method for a web streamer |
US7000031B2 (en) * | 2000-04-07 | 2006-02-14 | Broadcom Corporation | Method of providing synchronous transport of packets between asynchronous network nodes in a frame-based communications network |
GB0019232D0 (en) | 2000-08-04 | 2000-09-27 | Unilever Plc | Antiperspirant formulations |
US7174179B2 (en) * | 2001-09-20 | 2007-02-06 | Itt Manufacturing Enterprises, Inc. | Methods and apparatus for mitigating rain fading over SATCOM links via information throughput adaptation |
US7184713B2 (en) | 2002-06-20 | 2007-02-27 | Qualcomm, Incorporated | Rate control for multi-channel communication systems |
US7292574B2 (en) * | 2002-09-30 | 2007-11-06 | Intel Corporation | Automated method for mapping constant bit-rate network traffic onto a non-constant bit-rate network |
KR100448220B1 (en) * | 2002-10-07 | 2004-09-10 | 한국전자통신연구원 | A null packet insertion method and its apparatus in digital broadcasting transmission system |
KR100547889B1 (en) | 2003-08-25 | 2006-01-31 | 삼성전자주식회사 | Null packet filtering device for MP-2 transmission |
US20060045128A1 (en) * | 2004-09-01 | 2006-03-02 | Lila Madour | Per flow quality of service (QoS) enforcement for downlink data traffic |
FR2877176B1 (en) * | 2004-10-22 | 2007-04-20 | Agence Spatiale Europeenne | METHOD AND DEVICE FOR ORDERING AND TRANSMITTING DATA PACKETS FROM A COMMON TRANSMITTER TO A PLURALITY OF USERS SHARING A COUMMUN TRANSMIT CHANNEL. |
WO2006099695A1 (en) * | 2005-03-21 | 2006-09-28 | Newtec Cy | Managing traffic in a satellite transmission system |
US7839824B2 (en) * | 2007-07-31 | 2010-11-23 | Beceem Communications Inc. | Allocation of periodically distributed frames of wireless communication |
US8300716B1 (en) * | 2007-12-26 | 2012-10-30 | Marvell International Ltd. | Link adaptation for OFDM systems |
-
2009
- 2009-09-14 WO PCT/IB2009/006834 patent/WO2010032106A1/en active Application Filing
- 2009-09-14 EP EP09814151.8A patent/EP2327176B1/en active Active
- 2009-09-16 US US12/560,874 patent/US9923820B2/en active Active
-
2011
- 2011-08-02 US US13/196,406 patent/US8655992B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6163766A (en) * | 1998-08-14 | 2000-12-19 | Motorola, Inc. | Adaptive rate system and method for wireless communications |
US20020054578A1 (en) * | 2000-07-13 | 2002-05-09 | Qian Zhang | Channel and quality of service adaptation for multimedia over wireless networks |
Non-Patent Citations (1)
Title |
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See also references of WO2010032106A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010032106A9 (en) | 2011-02-24 |
US9923820B2 (en) | 2018-03-20 |
WO2010032106A1 (en) | 2010-03-25 |
US8655992B2 (en) | 2014-02-18 |
US20110286355A1 (en) | 2011-11-24 |
US20100257259A1 (en) | 2010-10-07 |
EP2327176A4 (en) | 2011-11-09 |
EP2327176B1 (en) | 2013-08-14 |
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